2116571 has 2 divisors, whose sum is σ = 2116572. Its totient is φ = 2116570.

The previous prime is 2116561. The next prime is 2116573. The reversal of 2116571 is 1756112.

2116571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2116571 is a prime.

Together with 2116573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2116573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058285 + 1058286.

It is an arithmetic number, because the mean of its divisors is an integer number (1058286).

2^2116571 is an apocalyptic number.

2116571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116571 is an equidigital number, since it uses as much as digits as its factorization.

2116571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 23.

The square root of 2116571 is about 1454.8439778890. The cubic root of 2116571 is about 128.3938673585.

The spelling of 2116571 in words is "two million, one hundred sixteen thousand, five hundred seventy-one".